When to evaluate dual licenses (was: license categories, was: I'm not supposed to use the ECL v2?)

[Smith, McCoy]

-----Original Message-----
John Cowan scripsit:

>> For example, suppose the distributor integrates the "GPLv2 or later"
>> work in a DRM module. Considering section 3 of GPLv3, the distributor
>> likely only wants to be bound by GPLv2. He could then explicitly
>> elect GPLv2 only, and comply by identifying GPLv2 and including
>> source on a CD-ROM with the product.
>> 
>> It would be most peculiar if the recipient could then receive a GPLv3
>> license to the work from the copyright holder and use its section 3
>> against the distributor, who explicitly refused to accept GPLv3.

>Hard cheese for him.  The buyer gets both a GPLv2 and a GPLv3 license
>for that part of the code directly from the author without further
action
>on anybody's part.

If that's the case, then does Bob (the intermediate distributor between
author Alice and buyer Carol) owe any obligation to Carol to provide
source and/or installation information to Carol?  Could he not just say
"your license is from Alice -- go get it from her!"